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1.
《Carbohydrate research》1987,162(2):271-276
A water-soluble galactomannan, isolated from the seeds of Cassia alata Linn, has been investigated by using methylation analysis, periodate and CrO3 oxidation, n.m.r. spectroscopy, and reaction with Bandeiraea simplicifolia lectin and an α-d-galactosidase. The polysaccharide is composed of heptasaccharide units joined by β-(1→4) linkages. The polysaccharide has a molecular weight of 26,400, corresponding to ∼23 units. 相似文献
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The leaves of 5 fern species of the genusCyathea, i.e.C. fauriei, C. mertensiana, C. leichhardtiana, C. podophylla andC. hancockii, have been chemically analysed. The former 3 species have kaempferol 3-sophoroside (sophoraflavonoloside) and kaempferol 7-rhamnoglucoside as glycosidic components, and the latter 2 species contain kaempferol 3-galactoside (trifolin) and kaempferol 3-rhamnoglucoside (nicotiflorin). In addition, vitexin, orientin, kaempferol 3-glucoside (astragalin), kaempferol 3-rhamnoside (afzelin) and kaempferol 7-arabinoside are detected as common constituents in all the 5 species analysed. 相似文献
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Le Thi Vien Quach Thi Thanh Van Tran Thi Hong Hanh Phan Thi thanh Huong Nguyen Thi Kim Thuy Nguyen The Cuong Nguyen Hai Dang Nguyen Van Thanh Nguyen Xuan Cuong Nguyen Hoai Nam Phan Van Kiem Chau Van Minh 《Bioorganic & medicinal chemistry letters》2017,27(16):3776-3781
Using various chromatographic separation techniques, ten flavonoid glycosides, including six new compounds namely barringosides A?F (1–6), were isolated from a methanol extract of the Barringtonia acutangula leaves. The structure elucidation was confirmed by spectroscopic analyses, including 1D and 2D NMR, and HR ESI MS. Their inhibitory effects on LPS-induced NO production in RAW264.7 cells were also evaluated. Among the isolated compounds, quercetin 3-O-β-d-(6-p-hydroxybenzoyl)galactopyranoside (9) showed significant effect with an IC50 of 20.00 ± 1.68 µM. This is the first report of these flavonoid glycosides from Barringtonia genus and their inhibition on LPS-induced NO production in RAW264.7 cells was reported here for the first time. 相似文献
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J. Singh 《Phytochemistry》1982,21(5):1177-1179
Two new 2-methylchromone glycosides have been identified in the leaves of Cassia multiluga. 相似文献
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Flamini G Pardini M Morelli I Ertugrul K Dural H Bagci Y Kargioglu M 《Phytochemistry》2002,61(4):433-437
Three flavonoid glycosides were isolated and characterized, together with a further 13 substances belonging to various classes of compounds, in particular two phenolic acids, a coumarin, a sugar and nine flavonoids from the flowered aerial parts of Centaurea pseudoscabiosa subsp. pseudoscabiosa Boiss. et Buhse (Asteraceae). Some considerations about their evolutionary meaning are provided. 相似文献
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Flavonoid glycosides from Salvia moorcroftiana wall 总被引:1,自引:0,他引:1
Phytochemical analysis of the whole plant of Salvia moorcroftiana Wall. (Lamiaceae) resulted in the isolation of two new flavonoid glycosides, together with three known compounds. The structures of the new compounds were established as genkwanin 4'-O-alpha-L-arabinopyranosyl-(1-->6)-beta-D-galactopyranoside (1) and genkwanin 4'-O-[alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->6)]-beta-D-galactopyranoside] (2). The structures of all compounds were elucidated by spectroscopic methods, including 2D NMR techniques. 相似文献
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《Phytochemistry》1987,26(2):507-508
From the roots of Cassia marginata, 1,3-dihydroxy-6,8-dimethoxy-2-methyl anthraquinone 3-O-rhamnosyl-(1 → 6)-glucopyranoside and 1,3,5,8-tetrahydroxy-2-methyl anthraquinone 3-O-glucoside have been isolated and their structures elucidated. 相似文献
10.
Sonia Chabani Hamada Haba Catherine Lavaud Mohammed Benkhaled Dominique Harakat 《Phytochemistry letters》2013,6(1):9-13
Two new flavonoid glycosides, together with twelve known compounds including seven flavonoids and five triterpenoids were isolated from the whole plant Atractylis flava Desf. The structures of new compounds have been elucidated as 6-hydroxykaempferol 6-methyl ether 7-O-β-glucopyranuronoside (1) and isorhamnetin 3-O-[(6″′-O-E-feruloyl)-β-d-glucopyranosyl-(1 → 2)]-β-d-galactopyranoside (2) named Atraflavoside A and B successively, on the basis of physical and spectroscopic analysis, including 1D and 2D NMR (1H, 13C, COSY, TOCSY, HSQC, HMBC and NOESY) and mass spectrometry (HRESIMS) whereas those of the known compounds (3–14) were established by spectral comparison with those published in the literature. 相似文献
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A benzophenone glucoside and two flavonol glycosides were isolated together with 27 known polyphenols from the aerial parts of Coleogyne ramosissima, and their structures were elucidated by spectroscopic and chemical methods as iriflophenone 2-O-beta-glucopyranoside, isorhamnetin 3-O-2G-rhamnopyranosylrutinoside-7-O-alpha-rhamnopyranoside and limocitrin 3-O-rutinoside-7-O-beta-glucopyranoside, respectively. 相似文献
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Seven flavonoids have been isolated from Pinus massoniana needles and identified as taxifolin and its 3′-O-β-D-glucopyranoside, (+)-catechin, naringenin-7-O-β-D-glucopyranoside and three new flavonoid glycosides, 6-C-methylaromadendrin 7-O-β-D-glucopyranoside, taxifolin 3′-O-β-D-(6″-O-phenylacetyl)-glucopyranoside and eriodictyol 3′-O-β-D-glucopyranoside. 相似文献
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In a leaf survey of sixty species from eight genera of the Dilleniaceae, the following flavonoids were characterized: myricetin 3,7,3′,4′-tetramethyl ether, mearnsetin 3-rhamnoside, ombuin 3,3′-disulphate, isorhamnetin 3,7,4′-trisulphate, kaempferol 3,7,4′-trisulphate and apigenin 7-galactosidesulphate. 相似文献
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Flavonoid and phenolic glycosides from Salvia officinalis 总被引:7,自引:0,他引:7
Two novel phenolic glycosides cis-p-coumaric acid 4-O-(2'-O-beta-D-apiofuranosyl)-beta-D-glucopyranoside and trans-p-coumaric acid 4-O-(2'-O-beta-D-apiofuranosyl)-beta-D-glucopyranoside were isolated and identified from Salvia officinalis together with 4-hydroxyacetophenone 4-O-(6'-O-beta-D-apiofuranosyl)-beta-D-glucopyranoside, luteolin 7-O-beta-D-glucoside, 7- and 3'-O-beta-D-glucuronide, 6-hydroxyluteolin 7-O-beta-D-glucoside and 7-O-glucuronide, and 6,8-di-C-beta-D-glucosylapigenin (vicenin-2). The luteolin glucuronides and vicenin-2 were identified as new sage constituents. 相似文献
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Flavonoid glycosides and saponins from Astragalus shikokianus 总被引:1,自引:0,他引:1
A new flavonol glycoside, kaempferol 3-O-alpha-L-rhamnopyranosyl -(1-->6)-[alpha-L-rhamnopyranosyl-(1-->2)]-beta-D-galactopyranosyl-7-O-a lpha-L-rhamnopyranoside, named astrasikokioside I, was isolated from aerial part of Astragalus shikokianus, together with two flavonol glycosides, kaempferol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-galactopyranosyl-7-O-alpha-L- rhamnopyranoside, robinin, and three triterpenoid glycosides, soyasaponin I, sophoraflavoside II and robinioside E. 相似文献
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珙桐叶中的黄酮甙成分 总被引:8,自引:1,他引:7
从珙桐 (DavidioinvolucrataBaill.)叶甲醇提取物的水溶性部分得到 6个黄酮及配糖体成分。经核磁共振谱、质谱和化学鉴定它们是 :山奈酚 (1 ) ,3 O β D 吡喃葡萄糖基 山奈酚甙 (2 ) ,3 O β D 吡喃半乳糖基 山奈酚甙 (3 ) ,槲皮素 (4 ) ,3 O β D 吡喃阿拉伯糖基 槲皮素甙 (5 ) ,3 O β D 吡喃半乳糖基 槲皮素甙 (6) ;均为已知化合物且是首次从珙桐植物中分离得到。 相似文献
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Two flavonol O-glycosides identified as the 3-O-alpha-arabinopyranosyl(1'-->6')-beta-glucopyranoside 7-O-beta-glucopyranosides of kaempferol and quercetin were isolated from the whole plant of Corydalis bungeana Turcz. together with eight known flavonol O-glycosides. Two isoquinolinone alkaloids were also obtained from the same source, including the new derivative, 6,7-methylenedioxy-2-(6-acetyl-2,3-methylenedioxybenzyl)-1(2H)-isoquinolinone. The structures were determined by spectroscopic methods (NMR and high-resolution MS). 相似文献
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Four new glycosides, including one anthraquinone glycoside (1), one naphthalene glycoside (2), and two naphthopyrone glycosides (3–4), with 10 known compounds (5–14) were isolated from the seeds of Cassia obtusifolia L. The new structures were determined by spectroscopic analysis and chemical transformations. 相似文献